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djk29a/Masks

Created March 4, 2013 19:01
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Masks
scala> for(masked <- 0 until 8) { println("Bits: 0xff & masked bits (" + masked + ") => " + (256 - (255 & (1 << masked)))) }
Bits: 0xff & masked bits (0) => 255
Bits: 0xff & masked bits (1) => 254
Bits: 0xff & masked bits (2) => 252
Bits: 0xff & masked bits (3) => 248
Bits: 0xff & masked bits (4) => 240
Bits: 0xff & masked bits (5) => 224
Bits: 0xff & masked bits (6) => 192
Bits: 0xff & masked bits (7) => 128
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djk29a commented Oct 9, 2015

Just wanted a quick reference for reminding myself how easy IPv4 subnet masking is when it's 3 am and I'm beating my head on trivial networking problems that shouldn't be that hard when I'm being sane.

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